Type-bar guide for typewriters



April 20,1926.

- R. F. BRANDT TYPE BAR GUIDE FOR TYPEiWRITERS 2 Sheets-$heet l Filed Feb. 1924 v INVENTORS Mid/ 7 Jwm ATTORNEYS.

Patented Apr. 20, 1926,

uuirsu STAT-ES PATENT ori ce] RUDOLPH r. BRANDT, or DAYTON, 0310, Assreriron 'ro DAYTON PORTABLE TYPE- wnrrnn COMPANY inooaronarnn, or Darren, 03110, A oonrona'rron OFDELA- wean.

TYPE-BAR GUIDE i or 'rrrnwnrrnns.

App1ieation filed February 4, 1924. Serial No. 690,865.

To all whom it may concern:

Be it known that I, RUDOLPH F. BRANDT, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Type-Bar Guides for Typewriters, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to type bar guides for typewriters;

It is my ob 'ect to eliminate wear on the type guide and wear on the type bar due to the constant chopping action of the type bar r on the type guide at the moment of the blow of the type on the platen. No matter how hard the surface of the type guide or bar may be this constant chopping will wear the guide and as a consequence destroy the alignment.

The type guides must be case hardened and usually this case isicut through atan early date, thus limiting the life of the parts and their satisfactory operation.

The type bars which are actuated by the outside case also have a tendency to chop the edges of the usual prongs which are employed as type guides.

It is my object to provide a type guide which will perfectly guide the type bar with the least wear to the bar and the guide. It is my object to provide such a guide that it may be hardened clear through and not merely on the surface. It is an object to provide guides which may be readily detached and cheaply replaced.

It is an object to provide a guide which will wear uniformly and upon which no two successive blows of the type bar will impinge in the same place. i

It is a further object to provide a type guide which may be adjusted with the aid of simple tools or no tools at all.

Referring to the drawings:

Figure is a plan view of a typical typewriter employing my improved type guide.

Figure 2 is a perspective of the supporting plate, arms and type guide rollers.

Figure 3 is an end elevation of the type guide rollers.

Referring to the drawings in detail:

It will be observed that 1 is a typewriter frame. A plurality of key levers 2 are provided having the keys 3. These key levers are connected by any suitable mechanism, such as that shown in the patent to Charles U. Carpenter, No. 1,451,203, April 10, 1923. My type bars are designated and are pivoted as at 5 upon a semi-circular segment 6..

Attached to the bottom of this segment is a supporting plate 7 which has a pair of upwardly extending arms 8 that are joined to gether by a cross member 9 at their outer ends. A pair of right angle fingers 10 pro-- ject outwardly from these arms in the neigl'rborhood of the platen 11. A ribbon 12 is guided between thev type guide and the platen in any desired manner from the spools 13 and 14.

As the type bars are actuated the end of each bar must pass between the fingers 10 and the rollers 15 which are rotatably mounted thereon on the bolts 16, so that they can freely turn on the ends of the fingers. The type bars pass in the open space 17 between these rollers which are case hardened and are of the same hardness through and through.

It will be apparent that as the type bars come anywhere within the space between the centers of the rolls and impinge upon the rolls, the type bar will be guided to a position between the rolls which rotate with the type bar, thus relieving the impact of the bar end on the guide and easing the wear which is a consequence of the impact. All of the type bars are guided alike giving perfeet location of the impression from the type.

As the rolls rotate they present a different surface each time to each successive type bar and they are rotated due to the impact or contact of the type bar with the freely rotating roll.

If the rolls need adjusting as to distance from one another, the fingers 10 can be bent as they are of relatively soft material. The slight resiliency of these fingers also serves to accommodate any severe mal-adjustment of the type bar without entirely wrecking the bar or its pivotal support.

I desire to comprehend within my invention such modifications as may be necessary to adapt it to varying conditions.

Having thus fully described my invention,

Letters Patent, is:

1. In a typewriter, a

type guide compris ing in combination, a plate adapted to be attached to a segment supporting the type bar, said plate having upwardly extending spaced arms integral therewith, a pair of spaced fingers carried onthe end of the arms, said fingers being bendable toward and from each other for adjustment purposes, and rollers mounted on said fingers adapted to rotate whereby the ends of the type bars when arriving in the vicinity of said rollers between the centers thereof will be guided to a predetermined location irrespective of the point of pivotingof the type bar and the rollers may be adjusted to bring the type bars to any desired adjustments.

2. Type bar guiding means comprising a plate adapted to be attached to a segmentsupporting the type bars, said plate comprising an upwardy extending arm integral therewith; spaced outwardly extending fingers integral with said arm and formed at its upper extremity, the said fingers lying in a substantially horizontal plane; and a roller mounted on each of said fingers and adapted to rotate thereon, whereby the ends of the type bars will be guided to a predetermined location irrespective of their points of pivoting.

In testimony whereof,I aflix my signature.v RUDOLPH F. BRANDT. 

